Found this online, yes it's probably 99% a mistake, but let's see if we can get it! It's unavailable online, but tomorow I'm going to see if I can get this for the same price in-store.
EDIT: Confirmation that it is not available in-store, you can order it off here: http://www.bigwentertainment.com.au/product/back-to-the-futu… (Thanks jonishere!)
and using the code "MEDIBANKBIGW" (Thanks btaussie!) you can get it for $15.80 posted. The item is currently 'On Order' so right now we're awaiting to see if they will be shipped or not.
EDIT 2: The page above is now dead, it appears they have finally realized what's happened. The real thing now is to wait and see if they honour it.
Predators BR (2010) is $12.87 on the Big W website: http://www.bigw.com.au/entertainment/DVDsBluray/DVDsBluray/b…
Let's price-match this one!
Interestingly, my email was worded differently to bradtheresa's:
"Unfortunately, your order for the product Back To The Future / Back To The Future 2 / Back To The Future 3 (Blu-ray) been cancelled and a refund has been issued.
We do not currently have this item available to order and we have removed it from our site.
As per our Terms and Conditions, we always attempt to be as accurate as possible with our product descriptions, availability and pricing. However, we are unable to warrant that product descriptions or other content of our website is accurate, complete, reliable, current or error free."